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| author | Marek Vasut <marex@denx.de> | 2022-04-25 00:44:03 +0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2022-05-20 10:03:01 +0300 |
| commit | 52b6b480db314d623eba536f390c0dc879900262 (patch) | |
| tree | ba7224e1eac1a9b2981a844de1ade9d61b844b89 /arch/arm/include/asm/arch-imx8m | |
| parent | 16ee0f2afd710854f8fd049d39c1ae99b0cacab7 (diff) | |
| download | u-boot-52b6b480db314d623eba536f390c0dc879900262.tar.xz | |
ARM: imx: imx8m: Introduce and use UART_BASE_ADDR(n)
Introduce helper macro UART_BASE_ADDR(n), which returns Nth UART base
address. Convert all board configurations to this new macro. This is the
first step toward switching CONFIG_MXC_UART_BASE to Kconfig. This is a
clean up, no functional change.
The new macro contains compile-time test to verify N is in suitable
range. The test works such that it multiplies constant N by constant
double-negation of size of a non-empty structure, i.e. it multiplies
constant N by constant 1 in each successful compilation case.
The non-empty structure may contain C11 _Static_assert(), make use of
this and place the kernel variant of static assert in there, so that
it performs the compile-time check for N in the correct range. Note
that it is not possible to directly use static_assert in compound
statements, hence this convoluted construct.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'arch/arm/include/asm/arch-imx8m')
| -rw-r--r-- | arch/arm/include/asm/arch-imx8m/imx-regs.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-imx8m/imx-regs.h b/arch/arm/include/asm/arch-imx8m/imx-regs.h index b2a8ad77ae..1da75528d4 100644 --- a/arch/arm/include/asm/arch-imx8m/imx-regs.h +++ b/arch/arm/include/asm/arch-imx8m/imx-regs.h @@ -48,6 +48,16 @@ #ifdef CONFIG_IMX8MM #define USDHC3_BASE_ADDR 0x30B60000 #endif +#define UART_BASE_ADDR(n) ( \ + !!sizeof(struct { \ + static_assert((n) >= 1 && (n) <= 4); \ + int pad; \ + }) * ( \ + (n) == 1 ? UART1_BASE_ADDR : \ + (n) == 2 ? UART2_BASE_ADDR : \ + (n) == 3 ? UART3_BASE_ADDR : \ + UART4_BASE_ADDR) \ + ) #define TZASC_BASE_ADDR 0x32F80000 |